usa	2014-11-29 07:32:36 +0900 (Sat, 29 Nov 2014)

  New Revision: 48639

  http://svn.ruby-lang.org/cgi-bin/viewvc.cgi?view=revision&revision=48639

  Log:
    * test/ruby/test_exception.rb (TestException#test_output_string_encoding): test
      for r48637.

  Modified files:
    trunk/test/ruby/test_exception.rb
Index: test/ruby/test_exception.rb
===================================================================
--- test/ruby/test_exception.rb	(revision 48638)
+++ test/ruby/test_exception.rb	(revision 48639)
@@ -673,4 +673,16 @@ end.join https://github.com/ruby/ruby/blob/trunk/test/ruby/test_exception.rb#L673
     assert_equal(:foo, e.name)
     assert_equal([1, 2], e.args)
   end
+
+  def test_output_string_encoding
+    # "\x82\xa0" in cp932 is "\u3042" (Japanese hiragana 'a')
+    # change $stderr to force calling rb_io_write() instead of fwrite()
+    assert_in_out_err(["-Eutf-8:cp932"], '$stderr = $stdout; raise "\x82\xa0"') do |outs, errs, status|
+      assert_equal 1, outs.size
+      assert_equal 0, errs.size
+      err = outs.first.force_encoding('utf-8')
+      assert err.valid_encoding?, 'must be valid encoding'
+      assert_match /\u3042/, err
+    end
+  end
 end

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